delete pics to save space

1.1605.cpp

@@ -0,0 +1,35 @@
+#include<bits/stdc++.h>
+using namespace std;
+int q[101][101];
+int sum=0;
+int i,j,n,m,t,sx,sy,x,y,ex,ey;
+const int da[]={-1,0,0,1};
+const int db[]={0,-1,1,0};
+void dfs(int a,int b)
+{
+    if(a==ex&&b==ey) { sum++; return; }
+    q[a][b]=0;
+    for(int i=0;i<4;i++)
+    	if(q[a+da[i]][b+db[i]]!=0)
+    	{
+    		dfs(a+da[i],b+db[i]);
+    		q[a+da[i]][b+db[i]]=1;
+    	}
+}
+int main()
+{
+    memset(q,0,sizeof(q));
+    cin>>n>>m>>t;
+    cin>>sx>>sy>>ex>>ey;
+    for(i=1;i<=n;i++)
+        for(j=1;j<=m;j++)
+            q[i][j]=1;
+    for(i=1;i<=t;i++)
+    {
+        cin>>x>>y;
+        q[x][y]=0;
+    }
+    dfs(sx,sy);
+    cout<<sum<<endl;
+    return 0;
+}